https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85583
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Reduced test-case:
$ cat json.ii
class b {
public:
virtual ~b();
};
template <typename> class c : b {};
class B {
c<char> d;
};
extern template class c<char>;
main() { B a; }
$ ./xgcc -B. -flto=8 -O2 -std=gnu++17 json.ii
json.ii:10:6: warning: ISO C++ forbids declaration of ‘main’ with no type
[-Wreturn-type]
main() { B a; }
^
lto1: internal compiler error: in lto_balanced_map, at lto/lto-partition.c:836
0x62014f lto_balanced_map(int, int)
../../gcc/lto/lto-partition.c:836
0x614b2c do_whole_program_analysis
../../gcc/lto/lto.c:3179
0x614b2c lto_main()
../../gcc/lto/lto.c:3374
Honza, can you please fix that?
